Home
Class 12
PHYSICS
Persons A and B are standing on the oppo...

Persons A and B are standing on the opposite sides of a `3.5` m wide water stream which they wish to cross. Each one of them has a rigid wooden plank whose mass can be neglected. However, each plank is only slightly longer than 3 m. So they decide to arrange them together as shown in the figure schematically. With B (mass 17 kg) standing, the maximum mass of A, who can walk over the plank is close to

A

17 kg

B

65 kg

C

80 kg

D

105 kg

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • KVPY 2021

    KVPY PREVIOUS YEAR|Exercise PART I (Chemistry)|2 Videos

Similar Questions

Explore conceptually related problems

A man of mass m=2kg is standing on a platform of mass M=5kg , then at any instant.

A man of mass m stands at the left end of a uniform plank of length L and mass M, which lies on a frictionaless surface of ice. If the man walks to the other end of the plank, then by what distance does the plank slide on the ice?

A man of mass M stands at one end of a plank of length L which lies at rest on a frictionless surface. The man walks to the other end of the planck. If the mass of the planck is M/2 , then the distance that the man moves relative to the ground is

In the figure shown, when the persons A and B exchange their positions, then (m2>m1) the plank moves towards_________

A man of mass M stands at one end of a plank of length L Which lies at rest on a frictionless surface . The man walks to the other end of the plank. If the mass of the plank is 3M, the distance that the man moves relative to the ground is

A horizontal plank is 10.0 m long with uniform density and mass 10 kg .It rests on two supports which are placed 1.0 m from each end as shown in the figure. A man of mass 80 kg can stand upto distance x on the plank without causing it to tip .The value of x is

A boy of mass m stands on one end of a wooden plank of length L and mass M. The plank is floating on water. If the boy walks from one end of the plank to the other end at a constant speed, the resulting displacement of the plank is given by :

A man of mass 80 kg stands on a plank of mass 40 kg . The plank is lying on a smooth horizontal floor. Initianlly both are at rest. The man starts walking on the plank towards north and stops after moving a distance of 6 m on the plank. Then

A plank of mass 3m is placed on a rough inclined plane and a man of mass m, the coefficient of friction between the board and inclined plane is mu = 0.5 , the minimum acceleration of man so that plank does not slide is :

KVPY PREVIOUS YEAR-KVPY-All Questions
  1. A long cylindrical pipe of radius 20 cm is closed at its upper end and...

    Text Solution

    |

  2. The word ‘’KVPY’’ is written on a board and viewed through different l...

    Text Solution

    |

  3. Persons A and B are standing on the opposite sides of a 3.5 m wide wat...

    Text Solution

    |

  4. Two different liquids of same mass are kept in two identical vessels, ...

    Text Solution

    |

  5. A ray of light originates from inside a glass slab and is incident on ...

    Text Solution

    |

  6. Four identical pendulums are made by made by attaching a small ball of...

    Text Solution

    |

  7. Two parallel discs are connected by a rigid rod of length L =0.5 m cen...

    Text Solution

    |

  8. The magnitude of acceleration of the electron in the n^(th) orbit of h...

    Text Solution

    |

  9. A carrot looks orange in colour because of the beta carotene molecule ...

    Text Solution

    |

  10. If some charge is given to a solid metallic sphere, the field inside r...

    Text Solution

    |

  11. Using dimensional analysis the resistivity in terms of fundamental con...

    Text Solution

    |

  12. Consider a bowl filled with water on which some black pepper powder ha...

    Text Solution

    |

  13. It was found that the refractive index of material of a certain prism ...

    Text Solution

    |

  14. Two circularly shaped linear polarisers are placed coaxially. The tran...

    Text Solution

    |

  15. An electron in an electron microscope with initial velocity v(0)hati e...

    Text Solution

    |

  16. A bird sitting on a single high tension wire does not get electrocuted...

    Text Solution

    |

  17. A positive charge q is placed at the center of a neutral hollow cylind...

    Text Solution

    |

  18. A transverse wave of frequency 500 Hz and speed 100 m/s is traveling i...

    Text Solution

    |

  19. A thin piece of thermal conductor of constant thermal conductivity ins...

    Text Solution

    |

  20. Which of the following plots represents schematically the dependence o...

    Text Solution

    |